A guide to use of the XWAVE program: Part 1: Radiated pressures from vibrating structures

XWAVE is a computer program for calculating steady-state pressures in an infinite fluid exterior to a closed, arbitrary shaped structural surface for which a normal velocity distribution has been determined. The velocity distribution is considered to result from a vibrational motion of the surface. The method of the program is based on a numerical solution of the surface Helmholtz integral equation which relates surface pressure to velocity and a subsequent numerical integration of the Helmholtz exterior field equation which relates field pressures to the surface velocity and pressure distribution. The program offers a variety of capabilities including: automatic generation of surface acoustic models for certain surfaces of revolution; automatic generation of several types of velocity boundary conditions; an option for incorporating structure-fluid interaction effects through use of surface mobility data; and use of input data to dynamically allocate computer core storage for arrays. Three calculations illustrate XWAVE data configurations and some applications to problems involving vibrating structural surfaces.